distinguish someone from a person who commits suicide and then homicide-suicide, not only are they so miserable this they are ready to die, but they feel that they need to get some sense of vengeance by killing other people and taking them with them. now, i know you want to predict and look around, parents want to see in their kids. you can't do that. it's really literally impossible to identify mass murderers in advance. what we can tell and parents can tell when their kids need assistance and need help and cowbell couns counseling, but can't predict they are going to be mass murderers. >> for more now and the new details involving the massacre, let's go straight to nbc's jay gray who is standing by in newtown. jay, what more can you tell us? >> reporter: well, craig, i think what you've said is very true, and what everybody has been talking about here, but i think it's important to point out there's been so much misinformation involved with this case that we're finally beginning to learn some of the very basic specifics here. we know that the accused gunman, adam lanza, did carry not only a s